/**
  ******************************************************************************
  * @file    PWR/PWR_CurrentConsumption/Src/main.c 
  * @author  MCD Application Team
  * @brief   This example shows how to use STM32F7xx PWR HAL API to enter
  *          and exit the Low Power modes and perform the current consumption
  *          measurement.
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "main.h"

/** @addtogroup STM32F4xx_HAL_Examples
  * @{
  */

/** @addtogroup PWR_CurrentConsumption
  * @{
  */ 

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
__IO uint32_t uwCounter = 0;

/* Private function prototypes -----------------------------------------------*/
static void MPU_Config(void);
static void SystemClock_Config(void);
static void CPU_CACHE_Enable(void);

/* Private functions ---------------------------------------------------------*/

/**
  * @brief  Main program
  * @param  None
  * @retval None
  */
int main(void)
{ 
  /* Configure the MPU attributes */
  MPU_Config();

  /* Enable the CPU Cache */
  CPU_CACHE_Enable();

  /* STM32F7xx HAL library initialization:
       - Configure the Flash ART accelerator
       - Systick timer is configured by default as source of time base, but user 
         can eventually implement his proper time base source (a general purpose 
         timer for example or other time source), keeping in mind that Time base 
         duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and 
         handled in milliseconds basis.
       - Set NVIC Group Priority to 4
       - Low Level Initialization
     */
  
  /* Configure the system clock to 100 MHz */
  SystemClock_Config();
    
  /* Configure LED6 and LED5 */
  BSP_LED_Init(LED6);
  BSP_LED_Init(LED5);

  /* Enable Power Clock */
  __HAL_RCC_PWR_CLK_ENABLE();
  
  /* Check and handle if the system was resumed from Standby mode */ 
  if(__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
  {
    __HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
  
    /* Infinite loop */
    while (1)
    {
      /* Toggle LED6 */
      BSP_LED_Toggle(LED6);
   
      /* Insert a 100ms delay */
      HAL_Delay(100);
    }
  }
  
  /* Configure USER Button */
  BSP_PB_Init(BUTTON_USER, BUTTON_MODE_GPIO);

  /* Wait until USER button is pressed to enter the Low Power mode */
  while(BSP_PB_GetState(BUTTON_USER) == RESET)
  {
    /* Toggle LED6 */
    BSP_LED_Toggle(LED6);
   
    /* Insert 1s Delay */
    HAL_Delay(1000);
  }
  /* Loop while USER Button is maintained pressed */
  while(BSP_PB_GetState(BUTTON_USER) == RESET)
  {
  }
  
  /* Loop while USER Button is maintained pressed */
  while(BSP_PB_GetState(BUTTON_USER) != RESET)
  {
  }

#if defined (SLEEP_MODE)
  /* Sleep Mode Entry 
      - System Running at PLL (216MHz)
      - Flash 7 wait state
      - Instruction and Data caches ON
      - Prefetch ON
      - Code running from Internal FLASH
      - All peripherals disabled.
      - Wake-up using EXTI Line (User Button)
   */
  SleepMode_Measure();
#elif defined (STOP_MODE)
  /* STOP Mode Entry 
      - RTC Clocked by LSI
      - Regulator in LP mode
      - HSI, HSE OFF and LSI OFF if not used as RTC Clock source  
      - No IWDG
      - FLASH in deep power down mode
      - Automatic Wake-up using RTC clocked by LSI (after ~20s)
   */
  StopMode_Measure();
#elif defined (STANDBY_MODE)
  /* STANDBY Mode Entry 
      - Backup SRAM and RTC OFF
      - IWDG and LSI OFF
      - Wake-up using WakeUp Pin (PA.00)
   */
  StandbyMode_Measure();
#elif defined (STANDBY_RTC_MODE)
  /* STANDBY Mode with RTC on LSI Entry 
      - RTC Clocked by LSI
      - IWDG OFF and LSI OFF if not used as RTC Clock source
      - Backup SRAM OFF
      - Automatic Wake-up using RTC clocked by LSI (after ~20s)
   */
  StandbyRTCMode_Measure();
#elif defined (STANDBY_BKPSRAM_MODE)
   /* STANDBY Mode with BKSRAM Entry
      - Backup SRAM ON
      - IWDG OFF
      - Wakeup using WakeUp Pin (USER Button)
    */
    StandbyBKPSRAMMode_Measure();
#endif

  if(uwCounter != 0)
  {
    BSP_LED_Init(LED6);
  }
  
  /* Infinite loop */
  while (1)
  {
    /* Toggle LED6 */
    BSP_LED_Toggle(LED6);
   
    /* Inserted Delay */
    HAL_Delay(100);
  }
}


/**
  * @brief  System Clock Configuration
  *         The system Clock is configured as follow : 
  *            System Clock source            = PLL (HSE)
  *            SYSCLK(Hz)                     = 216000000
  *            HCLK(Hz)                       = 216000000
  *            AHB Prescaler                  = 1
  *            APB1 Prescaler                 = 4
  *            APB2 Prescaler                 = 2
  *            HSE Frequency(Hz)              = 25000000
  *            PLL_M                          = 25
  *            PLL_N                          = 432
  *            PLL_P                          = 2
  *            PLL_Q                          = 9
  *            VDD(V)                         = 3.3
  *            Main regulator output voltage  = Scale1 mode
  *            Flash Latency(WS)              = 7
  * @param  None
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_OscInitTypeDef RCC_OscInitStruct;
  
  /* Enable HSE Oscillator and activate PLL with HSE as source */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 25;
  RCC_OscInitStruct.PLL.PLLN = 432;  
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 9;
  if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    while(1) {};
  }
  
  /* Activate the OverDrive to reach the 216 Mhz Frequency */
  if(HAL_PWREx_EnableOverDrive() != HAL_OK)
  {
    while(1) {};
  }
  
  
  /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 
     clocks dividers */
  RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;  
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;  
  if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_7) != HAL_OK)
  {
    while(1) {};
  }
}

/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
void Error_Handler(void)
{
  /* Turn LED5 on */
  BSP_LED_On(LED5);
  while(1)
  {
  }
}
    
/**
  * @brief SYSTICK callback
  * @param None
  * @retval None
  */
void HAL_SYSTICK_Callback(void)
{
  HAL_IncTick();
}

/**
  * @brief  Wake Up Timer callback
  * @param  hrtc : hrtc handle
  * @retval None
  */
void HAL_RTCEx_WakeUpTimerEventCallback(RTC_HandleTypeDef *hrtc)
{
  /* NOTE : add the specific code to handle the RTC wake up interrupt */
  uwCounter = 1;
}

/**
  * @brief EXTI line detection callbacks
  * @param GPIO_Pin: Specifies the pins connected EXTI line
  * @retval None
  */
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
  /* Configure LED6 */
  BSP_LED_Init(LED6);
  /* NOTE : add the specific code to handle the wake up button interrupt */
  if(GPIO_Pin == USER_BUTTON_PIN)
  { 
    uwCounter = 2;
  }
}

/**
  * @brief  CPU L1-Cache enable.
  * @param  None
  * @retval None
  */
static void CPU_CACHE_Enable(void)
{
  /* Enable I-Cache */
  SCB_EnableICache();

  /* Enable D-Cache */
  SCB_EnableDCache();
}


/**
  * @brief  Configure the MPU attributes
  * @param  None
  * @retval None
  */
static void MPU_Config(void)
{
  MPU_Region_InitTypeDef MPU_InitStruct;

  /* Disable the MPU */
  HAL_MPU_Disable();

  /* Configure the MPU as Strongly ordered for not defined regions */
  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
  MPU_InitStruct.BaseAddress = 0x00;
  MPU_InitStruct.Size = MPU_REGION_SIZE_4GB;
  MPU_InitStruct.AccessPermission = MPU_REGION_NO_ACCESS;
  MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;
  MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
  MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;
  MPU_InitStruct.Number = MPU_REGION_NUMBER0;
  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
  MPU_InitStruct.SubRegionDisable = 0x87;
  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_DISABLE;

  HAL_MPU_ConfigRegion(&MPU_InitStruct);

  /* Enable the MPU */
  HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t* file, uint32_t line)
{ 
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

  /* Infinite loop */
  while (1)
  {
  }
}
#endif

/**
  * @}
  */

/**
  * @}
  */

